“How many birthday posts occur on Facebook on a given day?” —Facebook Data Scientist interview candidate

“You can roll a dice three times. You will be given $X where X is the highest roll you get. You can choose to stop rolling at any time (e.g., if you roll a 6 on the first roll, you can stop). What is your expected payout?” —Facebook Data Scientist interview candidate

REUTERS/Eric Gaillard

“How much money is spent on the internet?” —Facebook Account Manager interview candidate